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| Mirrors > Home > MPE Home > Th. List > xmulpnf2 | Structured version Visualization version GIF version | ||
| Description: Multiplication by plus infinity on the left. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xmulpnf2 | ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (+∞ ·e 𝐴) = +∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfxr 11278 | . . . 4 ⊢ +∞ ∈ ℝ* | |
| 2 | xmulcom 13308 | . . . 4 ⊢ ((+∞ ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (+∞ ·e 𝐴) = (𝐴 ·e +∞)) | |
| 3 | 1, 2 | mpan 703 | . . 3 ⊢ (𝐴 ∈ ℝ* → (+∞ ·e 𝐴) = (𝐴 ·e +∞)) |
| 4 | 3 | adantr 486 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (+∞ ·e 𝐴) = (𝐴 ·e +∞)) |
| 5 | xmulpnf1 13316 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (𝐴 ·e +∞) = +∞) | |
| 6 | 4, 5 | eqtrd 2800 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (+∞ ·e 𝐴) = +∞) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 class class class wbr 5111 (class class class)co 7419 0cc0 11115 +∞cpnf 11255 ℝ*cxr 11257 < clt 11258 ·e cxmu 13152 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11171 ax-resscn 11172 ax-1cn 11173 ax-icn 11174 ax-addcl 11175 ax-addrcl 11176 ax-mulcl 11177 ax-mulcom 11179 ax-i2m1 11183 ax-rnegex 11186 ax-cnre 11188 ax-pre-lttri 11189 ax-pre-lttrn 11190 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7422 df-oprab 7423 df-mpo 7424 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11260 df-mnf 11261 df-xr 11262 df-ltxr 11263 df-xmul 13155 |
| This theorem is used by: xmulrid 13321 xmulgt0 13325 xmulasslem3 13328 xlemul1a 13330 xadddi2 13339 nmoix 24937 rexmul2 33169 nn0xmulclb 33186 hashxpe 33222 fldextrspundgdvdslem 34134 esumpinfsum 34531 |
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